Does anyone use Jacking pucks on there C4

I do not. There really is no place for the typical "puck" to go on the '85-'96 cars. There are two spots on each side of the body for jack placement, indicated by little "arrows" on the bottom lip of the body/frame. If your jack does not have a padded cradle, you can use a piece of lumber, or something similar to jack it up on the sides. Here is a pic of the location, but it will most likely NOT have the "jacking location" message. My '85 does not, but later years might. 

To help cushion the body points I put a hockey puck on the platter of my floor jack.  Do that on all the vehicles I use the floor jack to raise.

Hello, I know it may not be copisetic, but the screw type jacks that have a slit in them for the pinch weld can be fashioned to set in the jack dish. Requires some old time shade tree mechanics to be successful. 

Always! I have rubber pucks that I bought on Amazon for my floor jack, and I just purchase an aluminum pair on Amazon because although the rubber ones are sacraficial, they get cut up and chuncks partially attached lay in the grove so its not an even surface under the pinch. 

Exactly!  I was aghast when I saw how badly my old pucks got chewed up!  I wish that there was another way to get the platform to be more like my C5's.  But then, you have to remember to remove them, and I've found a way to screw that up, too.  I am amazed to realize how many miles the C5 travelled without losing that locked-in puck!

Hmmm... 🤔 wonder what grade of rubber the pucks you are using are made of.  Many years ago a hockey player friend of mine gave me a few old hockey pucks that I have been using.  They have held up pretty well.

Hard but not as hard as a hockey puck. Those are my back up plan. I would cut pinch weld slots in them on my table saw.........carefully

Thanks